diff --git a/Makefile b/Makefile
index af88aeb3..0e85f8ee 100644
--- a/Makefile
+++ b/Makefile
@@ -20,5 +20,6 @@ build:
 install:
 	go install cmd/tk
 
+.PHONY: docs
 docs:
 	mkdir -p ./docs/cmd && go run ./cmd/tk/ docgen
diff --git a/cmd/tk/create_kustomization.go b/cmd/tk/create_kustomization.go
index c296b3c3..87011d1a 100644
--- a/cmd/tk/create_kustomization.go
+++ b/cmd/tk/create_kustomization.go
@@ -24,25 +24,25 @@ var createKsCmd = &cobra.Command{
 The kustomization source command generates a kustomization.kustomize.fluxcd.io resource for a given GitRepository source.
 API spec: https://github.com/fluxcd/kustomize-controller/tree/master/docs/spec/v1alpha1`,
 	Example: `  # Create a kustomization from a source at a given path
-  create kustomization backend \
-    --source=webapp \
-    --path="./overlays/backend/" \
-    --prune="app=backend" \
+  create kustomization contour \
+    --source=contour \
+    --path="./examples/contour/" \
+    --prune="instance=contour" \
+    --generate=true \
     --interval=10m \
     --validate=client \
-    --health-check="StatefulSet/backend.test" \
+    --health-check="Deployment/contour.projectcontour" \
+    --health-check="DaemonSet/envoy.projectcontour" \
     --health-check-timeout=3m
 
-  # Create a kustomization that depends on another
-  create kustomization frontend \
-    --depends-on=backend \
+  # Create a kustomization that depends on the previous one
+  create kustomization webapp \
+    --depends-on=contour \
     --source=webapp \
-    --path="./overlays/frontend/" \
-    --prune="app=frontend" \
+    --path="./deploy/overlays/dev" \
+    --prune="env=dev,instance=webapp" \
     --interval=5m \
-    --validate=client \
-    --health-check="Deployment/frontend.test" \
-    --health-check-timeout=2m
+    --validate=client
 `,
 	RunE: createKsCmdRun,
 }
diff --git a/cmd/tk/create_source.go b/cmd/tk/create_source.go
index 2fe5e194..344ba02b 100644
--- a/cmd/tk/create_source.go
+++ b/cmd/tk/create_source.go
@@ -28,16 +28,30 @@ The create source command generates a source.fluxcd.io resource and waits for it
 For Git over SSH, host and SSH keys are automatically generated and stored in a Kubernetes secret.
 For private Git repositories, the basic authentication credentials are stored in a Kubernetes secret.`,
 	Example: `  # Create a source from a public Git repository master branch
-  create source podinfo --git-url https://github.com/stefanprodan/podinfo-deploy --git-branch master
+  create source podinfo \
+    --git-url=https://github.com/stefanprodan/podinfo \
+    --git-branch=master
+
+  # Create a source from a Git repository pinned to specific git tag
+  create source podinfo \
+    --git-url=https://github.com/stefanprodan/podinfo \
+    --git-tag="3.2.3"
 
   # Create a source from a public Git repository tag that matches a semver range
-  create source podinfo --git-url https://github.com/stefanprodan/podinfo-deploy  --git-semver=">=0.0.1-rc.1 <0.1.0"
+  create source podinfo \
+    --git-url=https://github.com/stefanprodan/podinfo \
+    --git-semver=">=3.2.0 <3.3.0"
 
   #  Create a source from a Git repository using SSH authentication
-  create source podinfo --git-url ssh://git@github.com/stefanprodan/podinfo-deploy
+  create source podinfo \
+    --git-url=ssh://git@github.com/stefanprodan/podinfo \
+    --git-branch=master
 
   # Create a source from a Git repository using basic authentication
-  create source podinfo --git-url https://github.com/stefanprodan/podinfo-deploy -u username -p password
+  create source podinfo \
+    --git-url=https://github.com/stefanprodan/podinfo \
+    --username=username \
+    --password=password
 `,
 	RunE: createSourceCmdRun,
 }
@@ -45,6 +59,7 @@ For private Git repositories, the basic authentication credentials are stored in
 var (
 	sourceGitURL    string
 	sourceGitBranch string
+	sourceGitTag    string
 	sourceGitSemver string
 	sourceUsername  string
 	sourcePassword  string
@@ -53,6 +68,7 @@ var (
 func init() {
 	createSourceCmd.Flags().StringVar(&sourceGitURL, "git-url", "", "git address, e.g. ssh://git@host/org/repository")
 	createSourceCmd.Flags().StringVar(&sourceGitBranch, "git-branch", "master", "git branch")
+	createSourceCmd.Flags().StringVar(&sourceGitTag, "git-tag", "", "git tag")
 	createSourceCmd.Flags().StringVar(&sourceGitSemver, "git-semver", "", "git tag semver range")
 	createSourceCmd.Flags().StringVarP(&sourceUsername, "username", "u", "", "basic authentication username")
 	createSourceCmd.Flags().StringVarP(&sourcePassword, "password", "p", "", "basic authentication password")
@@ -109,6 +125,7 @@ func createSourceCmdRun(cmd *cobra.Command, args []string) error {
 			Interval: metav1.Duration{
 				Duration: interval,
 			},
+			Reference: &sourcev1.GitRepositoryRef{},
 		},
 	}
 
@@ -117,14 +134,13 @@ func createSourceCmdRun(cmd *cobra.Command, args []string) error {
 			Name: name,
 		}
 	}
+
 	if sourceGitSemver != "" {
-		gitRepository.Spec.Reference = &sourcev1.GitRepositoryRef{
-			SemVer: sourceGitSemver,
-		}
+		gitRepository.Spec.Reference.SemVer = sourceGitSemver
+	} else if sourceGitTag != "" {
+		gitRepository.Spec.Reference.Tag = sourceGitTag
 	} else {
-		gitRepository.Spec.Reference = &sourcev1.GitRepositoryRef{
-			Branch: sourceGitBranch,
-		}
+		gitRepository.Spec.Reference.Branch = sourceGitBranch
 	}
 
 	kubeClient, err := utils.kubeClient(kubeconfig)
diff --git a/cmd/tk/main.go b/cmd/tk/main.go
index 9e6f43cb..4cde0e67 100644
--- a/cmd/tk/main.go
+++ b/cmd/tk/main.go
@@ -16,11 +16,35 @@ var VERSION = "0.0.1"
 
 var rootCmd = &cobra.Command{
 	Use:           "tk",
-	Short:         "Command line utility for assembling Kubernetes CD pipelines",
-	Long:          `Command line utility for assembling Kubernetes CD pipelines.`,
 	Version:       VERSION,
 	SilenceUsage:  true,
 	SilenceErrors: true,
+	Short:         "Command line utility for assembling Kubernetes CD pipelines",
+	Long:          `Command line utility for assembling Kubernetes CD pipelines.`,
+	Example: `  # Check prerequisites 
+  tk check --pre
+
+  # Install the latest version of the toolkit
+  tk install --version=master
+
+  # Create a source from a public Git repository
+  tk create source webapp \
+    --git-url=https://github.com/stefanprodan/podinfo \
+    --git-branch=master \
+    --interval=5m
+
+  # Create a kustomization for deploying a series of microservices
+  tk create kustomization webapp \
+    --source=webapp \
+    --path="./deploy/webapp/" \
+    --prune="instance=webapp" \
+    --generate=true \
+    --interval=5m \
+    --validate=client \
+    --health-check="Deployment/backend.webapp" \
+    --health-check="Deployment/frontend.webapp" \
+    --health-check-timeout=2m
+`,
 }
 
 var (